Liquid-registering device



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Patented Jan, 19, 1926..

UNITED STATES FICE.

FREDERICK HAROLD GRAIN AND LESLIE FREDERICK MAXWELL, 01 LONDON, ENGLAND.

LIQUID-REGISTERING DEVICE.

Application filed August 28, 1924. Serial No. 734,779.

To all whom it may concern:

Be it known that we, FREDERICK HAROLD GRAIN and LEsLIE FREDERICK MAXWELL, both residing at London, England, subjects of the King of Great Britain and Treland, have invented certain new and useful Tmprovements in Liquid-Registering Devices, of which the following is a specification.

This invention relates to means for the cumulative registering oi liquid, such as fuel in motor vehicles.

The invention is applicable to all cases where liquid is introduced into a vessel or tank and it is desired to register the quantity of liquid introduced into, drawn off or removed over considerable periods of time, for example, the total consumption of petrol during the running life or other determined period of a motor vehicle.

The means employed produce a cumulative indication of all liquid introduced into or removed from the vessel, and these means include a float associated or co-operating with an Archimedean screw in such a manner that the rise and fall of the float according to varying liquid levels causes a rotation of the screw, the rotary movement of which is communicated to the registering mechanism, which may include a master wheel or equivalent, which in turn conveys the movement to a train of counter wheels of conventional or approved form, with transfer or carry over devices if necessary, so that, for example, each time liquid is drawn oi from the vessel the falling movement of the float will operate the counting or registering devices to accumulate and totalize the quantity of liquid withdrawn in suitable units such as gallons and give a reading indication thereof in any known manner.

In addition, each time the vessel is filled or charged with liquid the rising movement of the float is caused through the same Are i=- medean screw to operate an indicator show= ing the quantity of liquid inserted, the reverse movement of the float on withdrawal of liquid also acting on said indicator to register the quantity of liquid remaining at all times up to complete emptying.

. In the application of the invention to a motor vehicle the device can with advantage he applied to the filler ea or equivalent of the petrol tank, or may e made a fixture therein, or again may be connected up to give an indication on the dash or instrument board so that the total consumption of petrol at any time may be readily seen.

An embodiment of the invention suitable for use with the petrol tank of an automobile is illustrated in the accompanying drawings in which Fig. l is a vertical section through part of the tank and the registering mechanism; Fig. 2 is a plan View of Fig. 1, Tig. 3 1s a plan view of parts of the registermg mechanism, and Fig. 4 a partial detail section of parts of said mechanism..

Tn said drawings a and a designate the top and base of the tank. Tn the base is a step hearing a r'or a worm or screw 2) which extends upward through the central tube 0 of a hollow float 0 which is provided at the top with a nut c engaged by the worm so that as the float rises and falls rotation is imparted to the worm. The float operates in a tubular chamher d the wall of which is slotted at d to term guides for fins 0 extending from opposite sides of the float, the latter being thus prevented from rotation and its limit of rise being determined by the upper termination of the slots d as at Around the upper end of the tubular chamber (5 the tank a is provided with interiorly threaded boss or collar c into which is screwed a boss 7- extending from a ca f enclosing the registering mechai which is connected to the worm l) by me of a sleeve coupling 6- which is pinned through a depending spindle g as 9 The said shaft g extends upwards and at its upper end carries a pointer g which works over a dial 9' supported by a plate 9 which is graduated at its periphery to indicate the total capacity, such as 6 gallons as il trated. This dial is also provided units, tens and-hundreds dials g, g g

respectively over each out which works pointers g, g g for giving a cumulative indication of consumption or withdrawal from the tank.

On the tank losing filled the float c rises and the worm 5 will be rotated so that the pointer 9 will move over the dial from the zero mark to indicate the extent of charging of the tank. (in liquid loeing withdrawn, however, the accumulating or total registering mechanism will come into operation. This mechanism comprises a toothed wheel it rigidly mounted on the pointer spindle ill) 

